<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品添加</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card shadow="hover">
       <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>

      <el-steps :active="activeIndex - 0" align-center class="step_class" finish-status="success">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数" ></el-step>
        <el-step title="商品属性" ></el-step>
        <el-step title="商品图片" ></el-step>
        <el-step title="商品内容" ></el-step>
        <el-step title="添加完成" ></el-step>
      </el-steps>

      <el-form :model="addForm" 
      :rules="addFormRules" 
      ref="addFormRef" 
      label-width="120px" 
      label-position="top">
      <el-tabs v-model="activeIndex" 
      :tab-position="tabPosition" 
      class="tabs_class"
      :before-leave="beforeLeaveFun"
      @tab-click="handleChangeTab"
      >
        <el-tab-pane label="基本信息" name="0">
          
          <el-form-item label="商品名称" prop="goods_name" class="form_item_class">
            <el-input v-model="addForm.goods_name"></el-input>
          </el-form-item>

          <el-form-item label="商品价格" prop="goods_price" class="form_item_class" type="number">
            <el-input v-model="addForm.goods_price"></el-input>
          </el-form-item>

          <el-form-item label="商品重量" prop="goods_weight" class="form_item_class" type="number">
            <el-input v-model="addForm.goods_weight"></el-input>
          </el-form-item>

          <el-form-item label="商品数量" prop="goods_number" class="form_item_class" type="number">
            <el-input v-model="addForm.goods_number"></el-input>
          </el-form-item>

          <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                :options="goodsCateList"
                :props="goodsCateProps"
                v-model="addForm.goods_cat"
                @change="handleChange"
                style="width: 300px"
                clearable>
              </el-cascader>
          </el-form-item>

        </el-tab-pane>

        <el-tab-pane label="商品参数" name="1">
        
        <el-form-item v-for="item in manyTableData"
        :key="item.attr_id" :label="item.attr_name">
          <!-- 复选框组 -->
          <el-checkbox-group v-model="item.attr_vals">
            <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border class="el_checkbox_class"></el-checkbox>
          </el-checkbox-group>
        </el-form-item>

        </el-tab-pane>
        <el-tab-pane label="商品属性" name="2">
        
        <el-form-item v-for="item in onlyTableData" :key="item.attr_id" :label="item.attr_name">
          <el-input v-model="item.attr_vals"></el-input>
        </el-form-item>
        
        </el-tab-pane>
        <el-tab-pane label="商品图片" name="3">
        
          <el-upload
            :action="actionUrl"
            :on-preview="handlePreview"
            :on-remove="handleRemove"
            list-type="picture"
            :headers="headerObj"
            :on-success="handleSuccess"
            >
             <div slot="tip" class="el-upload__tip">（只能上传jpg/png文件，点击图片名称可预览）</div>
            <el-button size="small" type="primary">点击上传</el-button>
          </el-upload>
        
        
        </el-tab-pane>
        <el-tab-pane label="商品内容" name="4">
        <!-- 富文本编辑器 -->

        <quill-editor v-model="addForm.goods_introduce"></quill-editor>

        <el-button type="primary" class="add_button" @click="submitAddForm">添加商品</el-button>
        
        </el-tab-pane>
      </el-tabs>
      </el-form>

    </el-card>


    <!-- 图片浏览对话框 -->
    <el-dialog
      title="预览图片"
      :visible.sync="previewDialogVisible"
      width="50%">
      <img :src="previewUrl" alt="图片资源出错" class="preview_class"></img>
    </el-dialog>

  </div>
</template>

<script>
import _ from 'lodash'
export default {
  created(){
    this.getGoodsCate();
  },
  data(){
    return{
      activeIndex: '0',
      tabPosition:'left',
      addForm:{
        goods_name:'',
        goods_price:0,
        goods_weight:0,
        goods_number:0,
        goods_cat:[],
        pics:[],
        goods_introduce:'',
        attrs:[]

      },
      addFormRules:{
        goods_name:[
          { required: true, message: "请输入商品名称", trigger: "blur"}
        ],
        goods_price:[
          { required: true, message: "请输入商品价格", trigger: "blur"}
        ],
        goods_weight:[
          { required: true, message: "请输入商品重量", trigger: "blur"}
        ],
        goods_number:[
          { required: true, message: "请输入商品数量", trigger: "blur"}
        ],
        goods_cat:[
          { required: true, message: "请选择商品分类", trigger: "blur"}
        ],
        
      },
      goodsCateList:[],
      goodsCateProps:{
        label:'cat_name',
        value:'cat_id',
        children:'children'
      },
      manyTableData:[],
      onlyTableData:[],
      actionUrl:'http://127.0.0.1:8888/api/private/v1/upload',
      headerObj:{
        Authorization: 
        window.sessionStorage.getItem('token')
      },
      previewUrl:'',
      previewDialogVisible:false,

    }
  },
  methods:{
    async getGoodsCate(){
      const {data:res} = await this.$http.get('categories');
      if(res.meta.status !== 200) return this.$message.error("商品分类信息获取失败");
      this.goodsCateList = res.data;
    },
    handleChange(){
      // console.log(this.addForm.goods_cat);
      if(this.addForm.goods_cat.length !== 3){
        this.addForm.goods_cat = [];
      }
    },
    beforeLeaveFun(activeName, oldActiveName){
      // console.log(activeName);
      // console.log(oldActiveName);
      if(oldActiveName === '0' && this.addForm.goods_cat.length !== 3){
        this.$message.error("请选择商品分类")
        return false;
      }
    },
    async handleChangeTab(){
      // console.log(this.activeIndex);
      if(this.activeIndex === '1'){
        const {data:res} = await this.$http.get(`categories/${this.calculateId}/attributes`, {params:{sel: 'many'}});
        if(res.meta.status !== 200) return this.$message.error("商品分类动态参数获取失败");
        res.data.forEach((item) => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ');
        });
        this.manyTableData = res.data;
        // console.log(this.manyTableData);
      }else if(this.activeIndex === '2'){
        // 获取静态属性
        const {data:res} = await this.$http.get(`categories/${this.calculateId}/attributes`, {params:{sel: 'only'}});
        if(res.meta.status !== 200) return this.$message.error("商品分类静态属性获取失败");

        this.onlyTableData = res.data;
        // console.log(this.onlyTableData);
      }
    },
    // 预览图片
    handlePreview(file){
      console.log(file);
      this.previewDialogVisible = true;
      this.previewUrl = file.response.data.url;
    },
    // 删除图片
    handleRemove(file){
      // console.log(file);
      const filePath = file.response.data.tmp_path;
      const i = this.addForm.pics.indexOf(filePath);
      this.addForm.pics.splice(i, 1);
      this.$message.success('删除照片成功');
      // console.log(this.addForm.pics);
    },
    // 成功上传的回调函数
    handleSuccess(response){
      // console.log(response);
      const picInfo = {
        pic: response.data.tmp_path
      };
      this.addForm.pics.push(picInfo);
      this.$message.success('上传照片成功');
      // console.log(this.addForm);
    },
    submitAddForm(){
      // console.log("666");
      this.$refs.addFormRef.validate(async valid=>{
        if(!valid) return this.$message.error('信息校验失败，请退回检查');
        // 防止改了addForm后，以前的依赖项（如级联框）报错，使用深拷贝
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(',');

        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          };
          this.addForm.attrs.push(newInfo);
        });
        

        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo);
        });
        

        form.attrs = this.addForm.attrs;
        // console.log(form);


        const {data:res} = await this.$http.post('goods', form);
        if(res.meta.status !== 201) return this.$message.error('添加商品失败');
        this.$router.push("/goods");
        this.$message.success('添加商品成功');
      })
    }


  },
  computed:{
    calculateId(){
      if(this.addForm.goods_cat.length === 3){
        return this.addForm.goods_cat[2];
      }
      return null;
    },
    

  }
 };
</script>

<style lang="less" scoped>
.step_class{
  margin: 15px 0;
}

.tabs_class{
  margin: 40px 0;
}

.form_item_class{
  width: 95%;
}

.el_checkbox_class{
  margin:0 10px 0 0 !important;
}

.preview_class{
  width:100%;
}

.add_button{
  margin-top:15px;
}
</style>
